#include<bits/stdc++.h>
using namespace std;

vector<vector<int>> results;

void backtrack(vector<int>& current, vector<bool>& used, int n){
    if(current.size() == n){
        results.push_back(current);
        return;
    }
    for(int i = 1; i <= n; i++){
        if(!used[i]){
            current.push_back(i);
            used[i] = true;
            backtrack(current, used, n);
            current.pop_back();
            used[i] = false;
        }
    }
}

int main(){
    int n; cin >> n;
    vector<int> current;
    vector<bool> used(n+1, false);
    backtrack(current, used, n);
    for(const auto& perm:results){
        for(int num:perm){
            cout << num << " ";
        }
        cout << endl;
    }
    return 0;
}